This line chart visualizes global COVID-19 death totals over time, using a linear scale to show cumulative deaths from the Johns Hopkins dataset. The SVG rendering is built with React and D3 v5, utilizing `d3.scaleTime` and `d3.scaleLinear` for axes, and `d3.line` for the path. It includes labeled marker lines for the five-million milestone and interactive axis tick marks generated via `d3.axisBottom` and `d3.axisLeft`.